package com.atguigu.springcloud.controller;

import com.atguigu.springcloud.entities.CommonResult;
import com.atguigu.springcloud.entities.Payment;
import com.atguigu.springcloud.lb.LoadBalancer;
import com.sun.org.apache.regexp.internal.RE;
import lombok.extern.slf4j.Slf4j;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import javax.annotation.Resource;
import java.net.URI;
import java.util.List;

/**
 * @Author XuZhuHong
 * @CreateTime 2021/11/2 20:51
 */
@RestController
@Slf4j
public class OrderController {
    @Resource //通过bean注入一个restTemplate的实体进去
    private RestTemplate restTemplate;

    @Resource
    private DiscoveryClient discoveryClient;
    @Resource
    private LoadBalancer loadBalancer;


    //先定义好地址方便调用
//    public static final String PAYMENT_URL = "http://localhost:8001";
    public static final String PAYMENT_URL = "http://cloud-payment-service";

    @GetMapping("/consumer/payment/create") //客户端用浏览器是get请求，但是底层实质发送post调用服务端8001
    public CommonResult< Payment > create(Payment payment) {
        //调用post的方法 是因为 服务提供者的这个接口就必须是post请求
        return restTemplate.postForObject(PAYMENT_URL+"/payment/create",
                payment, CommonResult.class);
    }

    @GetMapping("/consumer/payment/get/{id}")
    public CommonResult< Payment > getPaymentById(@PathVariable("id") Long id){
        //调用get的方法 是因为 服务提供者的这个接口就必须是get请求
        return restTemplate.getForObject(PAYMENT_URL+"/payment/get/"+id,
                CommonResult.class);
    }


    @GetMapping("/consumer/payment/lb")
    public String getPaymentLB(){
        List< ServiceInstance > instances = discoveryClient.getInstances("CLOUD-PAYMENT-SERVICE");

        if(instances == null || instances.size()<=0) {
            return null;
        }
        ServiceInstance serviceInstance = loadBalancer.instances(instances);
        URI uri = serviceInstance.getUri();

        return restTemplate.getForObject(uri+"/payment/lb",String.class);
    }

}
